diff --git a/doc/fluid/design/dist_train/src/prefetch_parameters.graffle b/doc/fluid/design/dist_train/src/prefetch_parameters.graffle
index 067178972219e99add6db5a82db0f104d3517862..c1a59b901745d81add42328b9995408d32d8127b 100644
Binary files a/doc/fluid/design/dist_train/src/prefetch_parameters.graffle and b/doc/fluid/design/dist_train/src/prefetch_parameters.graffle differ
diff --git a/doc/fluid/design/dist_train/src/prefetch_parameters.png b/doc/fluid/design/dist_train/src/prefetch_parameters.png
index ee54c35272898e0487c1193a85b204774811874b..433ea3d612b51f325c8f87a58bb35216667910d0 100644
Binary files a/doc/fluid/design/dist_train/src/prefetch_parameters.png and b/doc/fluid/design/dist_train/src/prefetch_parameters.png differ